Potassium voltage-gated channel subfamily Q member x (KCNQx)

Potassium voltage-gated channel subfamily Q members are a group of transmembrane proteins that form part of the family of voltage-gated potassium channels, essential for setting and shaping the electrical signals in neurons, heart and muscle cells. Each member (KCNQ1–KCNQ5) has distinct tissue distributions and physiological roles, including cardiac action potential repolarization (KCNQ1), regulation of neuronal excitability and transmission (KCNQ2, KCNQ3), auditory function (KCNQ4), and contributions to skeletal muscle function (KCNQ5). They can form both homomultimeric and heteromultimeric channels, producing the "M-current" in neurons, and are targeted by several drugs for neurological, cardiac, or sensory disorders. Note: The target name "Potassium voltage-gated channel subfamily Q member x" is not canonical and should be replaced with a specific member designation for structured mapping, e.g., "Potassium voltage-gated channel subfamily Q member 1 (KCNQ1)" for cardiac-specific functions, "Potassium voltage-gated channel subfamily Q member 2 (KCNQ2)" for neuronal roles, etc.

Other names

Potassium channel, voltage-gated subfamily QKv7.xKCNQxKvLQT

Potassium channel opener (activates potassium efflux, stabilizing membrane potential); Potassium channel blockade/inhibition (suppresses M-current, increases excitability)